If drivers are being corrupted and what not, with BSoDs... I'm not sure why anyone isn't pointing at your ram. Faulty/unstable ram corrupts files... GPU... not so much, especially unrelated drivers like USB.

You reset them to whatever the ram likes or is stock, if it fails the ram test, they are defective and you pretty much HAVE to RMA them. I'll give you 99% guarantee that your GFX is perfect... though I still advise that you get better cooling. It's always a good bet on stock cards.

Well I tried again this morning, put in one stick ran OCCT for 30 mins was stable, replaced it with the other stick ran for 30 mins was stable. Ran both sticks dual channel - crashed with 4 mins left. Ran both sticks single channel for 30 mins was stable. Shall I test the CPU with OCCT?